The U.S. Supreme Court delivered a significant setback to California’s clean-energy agenda in a 7–2 decision, upholding a challenge by fuel producers to the EPA’s approval of the state’s aggressive electric-vehicle mandates. Justice Brett Kavanaugh, writing for the majority, affirmed that businesses have Article III standing to sue over excess regulation. He criticized the EPA for shifting its legal position on whether the Clean Air Act permits California to mandate EV manufacturing and limit greenhouse emissions—even questioning the agency’s changing arguments.

Fuel industry groups, led by the American Fuel & Petrochemical Manufacturers, celebrated the ruling as affirming that Congress did not empower California to ban gasoline-powered vehicles or impose fleet-wide greenhouse gas limits. The decision follows President Trump’s recent overturning of major California climate policies via congressional resolutions.

Simultaneously, the Ninth Circuit upheld Trump’s authority to deploy the California National Guard to safeguard federal entities—a response to a lower court ruling it deemed unconstitutional. President Trump praised the decision, calling it vital for maintaining order in cities like Los Angeles.